Fix CI errors: add pull-requests write permission and move README out of workflows directory

Co-authored-by: l0lawrence <[email protected]>

Author: Copilot

.github/workflows/README-strict-version-pins.md renamed to .github/README-strict-version-pins.md

@@ -7,7 +7,7 @@ on:
       - 'sdk/**/pyproject.toml'
 
 permissions:
-  pull-requests: read
+  pull-requests: write
   contents: read
 
 jobs: